HP ZBook 15 G4 Mobile Workstation User Manual

HP ZBook 15 G4 Mobile WorkstationMaintenance and Service GuideIMPORTANT! This document is intended for HP authorized service providers only.

8 Using HP PC Hardware Diagnostics (UEFI) ... 156Do

3. Disconnect all external connected peripheral devices such as USB storage devices, external displays, and printers.4. Unplug the AC adapter from the

●Reseating the hard drive can resolve a POST error 3F0 (no boot device) issue (see POST Error Messages and User Actions on page 140).●Reseating the ke

●External USB keyboard●External mouseNOTE: After the service door is removed, disconnect all connections (internal keyboard, display, discrete GPU, ha

NOTE: Most of the time, eective troubleshooting can prevent a system board replacement.Items that may prevent resolution of the issue:●The informatio

7. Be sure that the boot option is set to a working operating system drive.8. Be sure that externally connected monitors are turned on and their power

●Product model name and number●Product identication number●Applicable error messages●Add-on boards or hardware●Third-party hardware or software●Opera

●Check power light (7. Status lights, blinking light codes, troubleshooting lights, and POST error messages on page 84). Rear power light indicates e

1. Test essential hardware conguration (11. Test with minimum conguration on page 91, 12. Test with veried working conguration (hardware and/or o

3. Test essential hardware conguration (11. Test with minimum conguration on page 91)a. If system boots, reinstall nonessential hardware one compon

Battery not recognized, not charging Symptoms●No battery status light●Blinking amber (critically low battery level)●No boot without AC adapterPossible

1 Product descriptionCategory DescriptionProduct Name HP ZBook 15 G4 Mobile WorkstationProcessors 7th Generation Intel® Core™ processorsIntel Core i7-

5. Verify the new replacement.Tips and tricks See the computer user guide for instructions regarding battery maintenance and increasing battery life.

Reference “HP Notebook Mobile Workstations - Improving Battery Performance (Windows 10, 8, 7, Vista)” at http://support.hp.com/us-en/document/c012976

2. Remove all external devices, including docking station. Recently added hardware and/or applications may cause graphics driver conict and result i

2. See Status, Blinking Lights, and Error Message (7. Status lights, blinking light codes, troubleshooting lights, and POST error messages on page 84

BIOS password SymptomsSome sections are unavailable (grayed out)Possible causesBIOS administration password is required. Troubleshooting steps1. Revi

Intermittent shutdown Symptoms●Shutdown during startup●Shutdown during operationPossible causesIt is often dicult to troubleshoot an intermittent iss

Diagnostics and Tools on page 80) and verify that thermal sensors are within limits after thermal condition is serviced. Hardware related issue1. Ch

1. Note the blue screen error message and what activity was performed at the time.2. Perform a hard reset (8. Hard reset on page 89) after disconnecti

Right-click on My Computer, and then select Properties > Advanced. Under Startup and Recovery, select Settings. Clear the Automatically Restart che

Troubleshooting stepsFollow suggested steps below one at a time to verify normal boot process:1. Disconnect all external peripherals, and perform a

Category DescriptionPanel 39.6 cm (15.6 in), antiglare, LED backlight, 16:9 aspect ratio●FHD (1920×1080), SVA, 60% CG, slim, 300 nits with or without

No wake up SymptomsWhen resuming from a power management state the computer may display:●Blank screen●Some light activityPossible causesPower-saving m

Unresponsive SymptomUnresponsivePossible causesProgram in use has stopped responding to commands. Troubleshooting steps1. If possible, use the Window

HP Smart Adapter warning message SymptomWarning message displayed in WindowPossible causesLess powerful AC adapter, BIOS out of date. Troubleshootin

DisplayDisplay anomaliesThe display panel is a eld replaceable unit (FRU) and must be replaced by only authorized technicians. However, HP highly rec

Quick check●Visually examine the display for cracked screen, liquid crystal leak, dirty spots on glass, etc.●Reset and update BIOS and docking rmware

Display assembly diagramThe display assembly diagram shows basic video components: system board, graphics cards, display cables, display connectors, o

No video (external) SymptomNo image on external monitorPossible causesExternal monitor, resolution, display conguration, drivers.Troubleshooting step

No or bad external video via docking SymptomsNo or bad image on external monitor via ports of docking station (VGA, DP, TB, display port, etc.)Possibl

If the external monitor also shows incorrect color, it is graphics card issue. Test with a veried working graphics card. Verify display cable and c

I/O devicesNOTE:●Make sure external devices are supported and compliant (i.e., USB Type C, Thunderbolt 3, PCI Express, etc).●If you have problems with

Category Description256-GB, NVMe, MLC (Z Turbo Drive)256-GB, NVMe,TLC (Z Turbo Drive)Primary 2.5-in SATA hard drive Primary 2.5-in storage not require

Keyboard point stick SymptomPoint stick not working properlyPossible causesDust trapped under point stick, loose point stick cap. Troubleshooting ste

TouchPad SymptomsNot working properlyPossible causesOn/O enabled, driver, settings. Troubleshooting steps1. Ensure touchpad On/O light is not amber

8. Diagnose with HP PC Hardware Diagnostics (UEFI) to isolate a hardware issue from a software issue.9. Examine Ethernet ports on the computer, docki

point. If disabling U-APSD improves the throughput issue, check with the access point provider for updated rmware that resolves the issue.11. Test w

USB Symptoms●USB devices are not recognized●USB devices are not chargingPossible causesUSB devices do not have the latest software drivers, port insu

Smart card reader Symptoms●Not recognized●Unable to writePossible causesPhysical damage, incorrect insertion, dirt, driver, malfunctioning card reader

Speaker, headphone - audio issues Symptoms●No sound from external or internal speakers●Distorted sound, too soft, too loud, intermittentPossible cause

Thunderbolt (TB) SymptomThunderbolt device not workingPossible causesBIOS, drivers, and user settings. Troubleshooting steps1. Update to the latest

Thunderbolt 3 dock SymptomThunderbolt dock and devices not workingPossible causesSystem BIOS, rmware, drivers, user settings, Thunderbolt dock rmw

Use a veried working dock. If the computer operates normally, there is a problem with the original dock.References Go to http://support.hp.com/, e

Category DescriptionSupports "No WWAN" optionSupports WWAN after market optionSupport for the following WWAN formats:●Huawei HP It4132, LTE/

Hard drive/solid-state drive not recognized SymptomHard drive is not recognized during POSTPossible causesLoose connection, faulty hard drive, faulty

Read-write error Symptoms●Post error message (i.e., error code 301)●Hang when working on data, les, documentsPossible causesLoose connection, faulty

Noisy hard driveIMPORTANT: An SSD has no moving parts, so it does not make loud or clicking noise.Depending on type and rotational speed, some hard dr

MechanicalFan error message - 90B SymptomsFan error 90B at bootCAUTION: May lead to system shutdown, data loss or possible system damage.Possible caus

See “Reducing Heat Inside the PC to Prevent Overheating” at http://h20564.www2.hp.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c01657

Fan runs constantly Symptoms●Fan never stops running●Generates heat●Decreased computer performancePossible causes●BIOS not up to date.●Thermal conditi

●Reducing Heat Inside the PC to Prevent Overheating: http://h20564.www2.hp.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c01657439.●Im

Stuck power button Symptoms●Rear power indicator light is on●Will not turn on when power button is pressed●Automatically powers onPossible causesStick

SSD–Solid-state driveTSG–Troubleshooting GuideUEFI–Unied Extensible Firmware InterfaceWLAN–Wireless local area networkWWAN–Wireless wide area network

Memory module errorThis computer has experienced a memory initialization problem resulting in a failed startup. This issue may be related to the memor

Category DescriptionTrusted platform module (TPM 9670) 2.0 (Inneon; soldered down)Fingerprint readerSupport "No Fingerprint Reader" optionI

NOTE: The computer will attempt to notify you of this problem through a series of blinking lights. When you attempt to turn on the computer from an “O

Test description Displayed message Error code Possible user actionsBecause seating or reseating a wireless LAN adapter is unique to each computer mode

Tasks Weekly Monthly OccasionallyClean the exterior of the computer. XClose programs that are not being used. XPrevent programs from loading a

Microsoft general troubleshooting of Windows bug check codes●If you recently added hardware to the system, try removing or replacing it. Or check with

Windows Software Development Kit (SDK)1. Download the SDK from the following link:https://dev.windows.com/en-US/downloads/windows-10-sdk2. Set up the

4. Run the SDK as an administrator.5. Set the symbol path. Select File > Symbol File Path.●In the Symbol path box, type SRV*C:\Windows\symbol_cache

6. Open the crash dump le.146 Chapter 6 Troubleshooting guide

7. Analyze the le. In the following memory dump sample, look for Bug Check 0x3B. The ATIKMAG driver needs to be investigated for further root cause.L

Display Issue: Pixel AnomaliesAll HP notebook displays adhere to strict quality and reliability specications. A small percentage of display panels ma

Cable managementProper routing of the internal cables is critical to the operation of the computer. Follow good cable management practices when removi

2 ComponentsRightNOTE: The term “hard drive”, “hard disk”, and/or “solid-state drive (SSD)” is used to generically refer the computer’s primary mass s

Connector typesIMPORTANT: Connector pins and connector gold ngers should not be touched directly with bare hands.There are several dierent types of

Multi-pin horizontal insert connector (LVDS cable to display panel)Insert procedure:1. Slide connector evenly into receptacle on same horizontal plane

7 Computer Setup (BIOS), TPM, and HP Sure StartUsing Computer Setup Computer Setup, or Basic Input/Output System (BIOS), controls communication betwee

To exit Computer Setup menus, choose one of the following methods:●To exit Computer Setup menus without saving your changes:Select the Exit icon in th

1. Start Computer Setup. See Starting Computer Setup on page 152.2. Select Main, and then select System Information.3. To exit Computer Setup without

NOTE: After a message on the screen reports a successful installation, you can delete the downloaded le from your hard drive.Changing the boot order

8 Using HP PC Hardware Diagnostics (UEFI)HP PC Hardware Diagnostics is a Unied Extensible Firmware Interface (UEFI) that allows you to run diagnostic

3. Enter the product name or number.– or –Select Identify now to let HP automatically detect your product.4. Select your computer, and then select you

9 Backing up, restoring, and recoveringThis chapter provides information about the following processes. The information in the chapter is standard pro

You can use Windows tools to create system restore points and create backups of personal information, see Using Windows tools on page 159.●If your com

Component Description(5) USB Type-C SuperSpeed and Thunderbolt ports (2)When the computer is on, connect and charge USB devices that have Type-C conne

Restore and recoveryThere are several options for recovering your system. Choose the method that best matches your situation and level of expertise:IM

website. Go to http://www.hp.com/support, select your country or region, and follow the on-screen instructions.IMPORTANT: HP Recovery Manager does not

Changing the computer boot orderIf your computer does not restart in HP Recovery Manager, you can change the computer boot order, which is the order o

Removing the HP Recovery partition (select products only)HP Recovery Manager software allows you to remove the HP Recovery partition to free up hard d

10 SpecicationsComputer specications Metric U.S.DimensionsWidth 386 mm 15.2 inDepth 264 mm 10.4 inHeight Dream Color (front) 26.33 mm 1.037 inHeigh

Hard drive specications 1-TB* 500-GB**DimensionsHeight 9.5 mm 9.5 mmLength 100.4 mm 100.4 mmWidth 69.9 mm 69.9 mmWeight 110 g 110 gInterface type SA

M.2 solid-state drive specications 256-GB* 512-GB*DimensionsHeight 1 mm 1 mmLength 50.8 mm 50.8 mmWidth 28.9 mm 28.9 mmWeight < 10 g < 10 gInt

M.2 PCIe solid-state drive specications 256-GB* 512-GB* 1-TB*DimensionsHeight 1 mm 1 mm 1 mmLength 50.8 mm 50.8 mm 50.8 mmWidth 28.9 mm 28.9 mm 28.9

11 Statement of memory volatilityThe purpose of this chapter is to provide general information regarding nonvolatile memory in HP Business computers.

g. If a DriveLock password is set, select the Security menu, and scroll down to Hard Drive Utilities under the Utilities menu. Select Hard Drive Utili

LeftComponent Description(1) Security cable slot Attaches an optional security cable to the computer.NOTE: The security cable is designed to act as a

Nonvolatile memory usageNonvolatile Memory Type Amount (Size)Does this memory store customer data?Does this memory retain data when power is removed?W

Nonvolatile Memory Type Amount (Size)Does this memory store customer data?Does this memory retain data when power is removed?What is the purpose of th

Questions and answers1. How can the BIOS settings be restored (returned to factory settings)?IMPORTANT: Restore defaults does not securely erase any d

IMPORTANT: Resetting will result in the loss of information.These steps will not reset Custom Secure Boot Keys. See question and answer 7 for informat

12 Power cord set requirementsThe wide-range input feature of the computer permits it to operate from any line voltage from 100 to 120 volts AC, or fr

Requirements for specic countries and regionsCountry/region Accredited agency Applicable note numberArgentina IRAM 1Australia SAA 1Austria OVE 1Belgi

Country/region Accredited agency Applicable note number3. The appliance coupler, exible cord, and wall plug must bear a “T” mark and registration num

13 RecyclingWhen a non-rechargeable or rechargeable battery has reached the end of its useful life, do not dispose of the battery in general household

IndexAAC adapter, spare part numbers 26action keysusing 14action keys, identifying 13Antenna Kit, WLANspare part number 23Antenna Kit, WWANspare part

ngerprint reader board bracketillustrated 21removal 61ngerprint reader, identifying 13fn key, identifying 13Ggraphics boardremoval 56spare part numb

DisplayComponent Description(1) WLAN antennas* (2) (internal; select products only) Send and receive wireless signals to communicate with wireless loc

Plastics Kitcomponents 24spare part number 24pointing device, product description 4pointing stick 10pointing stick cableillustrated 23portsexternal mo

TouchPadbuttons 10TouchPad cableillustrated 23TouchPad light, identifying 10, 11TouchPad moduleremoval 58spare part number 19, 58TouchPad on/o button

© Copyright 2017 HP Development Company, L.P.AMD is a trademark of Advanced Micro Devices, Inc. Bluetooth is a trademark owned by its proprietor and u

Keyboard areaTouchPadComponent Description(1) Pointing stick Moves the pointer on the screen.(2) Left pointing stick button Functions like the lef

LightsComponent Description(1) Power light ●On: The computer is on.●Blinking: The computer is in the Sleep state, a power-saving state. The computer s

Buttons and ngerprint readerComponent Description(1) Power button●When the computer is o, press the button to turn on the computer.●When the compute

Component Description(3) Volume mute button Mutes and restores speaker sound.(4) Fingerprint reader (select products only) Allows a ngerprint logon

Action keysAn action key performs the function indicated by the icon on the key. To determine which keys are on your product, see Special keys on page

BottomComponent Description(1) Speakers (2) Produce sound.(2) Vents (2) Enable airow to cool internal components.NOTE: The computer fan starts up

FrontComponent Description(1) Wireless light ●White: An integrated wireless device, such as a wireless local area network (WLAN) device and/or a Bluet

LabelsThe labels axed to the computer provide information you may need when you troubleshoot system problems or travel internationally with the compu

3 Illustrated parts catalogComputer major components18 Chapter 3 Illustrated parts catalog

Item Component Spare part number(1) Display assembly (Touch screen; FHD, UWVA; includes camera) 921058-001(2) Display assembly (Non-touch; UHD, UWVA)F

Safety warning noticeWARNING! To reduce the possibility of heat-related injuries or of overheating the computer, do not place the computer directly on

Item Component Spare part number ●16-GB 862396-852 ●8-GB 862398-852 ●4-GB 862397-852 For use in models with Xeon Core processors ●16-GB 835886-002

Item Component Spare part numberxxxxxx-001: Windows 7 or non-Windows operating systemsxxxxxx-601: Windows 10 operating system Equipped with an Intel

Display assembly subcomponentsItem Component Spare part number(1) Display bezel For use only on computer models not equipped with a camera 848241-001

Item Component Spare part number Does not include display cable: ●SVA 819354-004 ●UWVA 819355-005(4) Display hinges (includes left and right hinges

Plastics KitItem Component Spare part number Plastics Kit, includes: 850152-001(1) VGA cap(2) Fingerprint reader bezel(3) SD card reader insert24 Cha

Mass storage devicesItem Component Spare part number(1) Solid-state drive, M.2 SATA-3 drives, TLC: ●512-GB, FIPS 921052-001 ●256-GB, TLC 932478-001

Item Component Spare part number 1-TB, 5400-rpm 762990-002 500-GB, 5400-rpm, hybrid 8 GB 732000-002 500-GB, 7200-rpm 703267-002 500-GB, 5400-rpm,

4 Removal and replacement procedures preliminary requirementsTools requiredYou will need the following tools to complete the removal and replacement p

Cables and connectorsCAUTION: When servicing the computer, be sure that cables are placed in their proper locations during the reassembly process. Imp

CAUTION: To prevent damage to the computer when you are removing or installing internal components, observe these precautions:Keep components in their

iv Safety warning notice

Packaging and transporting guidelinesFollow these grounding guidelines when packaging and transporting equipment:●To avoid hand contact, transport pro

Equipment guidelinesGrounding equipment must include either a wrist strap or a foot strap at a grounded workstation.●When seated, wear a wrist strap c

5 Removal and replacement procedures for Authorized Service Provider partsCAUTION: Components described in this chapter should only be accessed by an

b. Remove the display bezel.The display bezel is available using the following spare part numbers:848241-001: Models without a camera850154-001: Model

CAUTION: Make sure the work surface is clear of tools, screws, and any other foreign objects. Failure to follow this caution can result in damage to t

c. Remove the camera/microphone module (3).The camera/microphone module is available using spare part number 819336-006. The microphone module is avai

Bottom coverDescription Spare part numberBottom cover (includes SSD therrmal pad) 928423-001Before removing the bottom cover, follow these steps:1. Tu

BatteryDescription Spare part number9-cell, 90-WHr, 2.635-AHr, li-ion battery 808452-002Before removing the battery, follow these steps:1. Turn o the

Memory moduleDescription Spare part numberMemory module for use in models with Intel Core processors 16-GB 862396-8528-GB 862398-8524-GB 862397-852Me

Remove the memory module:1. Spread the retaining tabs (1) on each side of the memory module slot to release the memory module. (The memory module tilt

Table of contents1 Product description ...

Solid-state drive (M.2)Description Spare part numberM.2 solid-state drives (SATA-3, TLC): ●512-GB, FIPS 921052-001●256-GB, TLC 932478-001●256-GB, sel

WLAN moduleDescription Spare part numberIntel Dual band wireless-AC 8265 802.11AC 2x2 WiFi + BT 4.2 Combo Adaptor (non-vPro) 910264-852Intel Dual band

3. Remove the WLAN module (3) by pulling the module away from the slot at an angle.NOTE: WLAN modules are notched to prevent incorrect installation.NO

WWAN moduleDescription Spare part numberHP lt4120 LTE/EVDO/HSPA+ Gobi 4G Mobile Broadband Module 800870-002Fibocom HP hs3210 WW HSPA+ w/o GPS 918670-8

3. Remove the WWAN module (3) by pulling the module away from the slot at an angle.NOTE: WWAN modules are notched to prevent incorrect installation.NO

Smart card readerDescription Spare part numberSmart card reader (includes cable)The smart card reader bracket is available in the Bracket Kit, spare p

Hard driveNOTE: The hard drive spare part kit does not include the hard drive bracket or screws. These components are included in the Hard Drive Hardw

2. Lift the hard drive from the computer (2).3. If it is necessary to disassemble the hard drive, perform the following steps:a. Remove the four Phill

RTC batteryDescription Spare part numberRTC battery (includes cable and double-sided adhesive) 922939-001Before removing the RTC battery, follow these

KeyboardFor use in country or region Spare part numberFor use in country or regionSpare part numberKeyboard with backlight and pointing stick (include

5 Removal and replacement procedures for Authorized Service Provider parts ... 32Component replaceme

2. Partially open the computer.3. Rest and secure the computer on its left side.4. Insert a thin tool into the keyboard release hole near the fan, and

8. Release the zero insertion force (ZIF) connector (2) to which the keyboard cable is attached, and then disconnect the keyboard cable from the syste

Heat sink assemblyNOTE: Only remove the heat sink from the system board if its removal is required to remove other components. It is preferred to leav

b. Remove the heat sink (2).NOTE: Due to the adhesive quality of the thermal material located between the heat sink assembly and the system board comp

b. Remove the heat sink (2).NOTE: Due to the adhesive quality of the thermal material located between the heat sink assembly and the system board comp

●On models with UMA graphics memory, thermal pads are used on the processor (1) and the heat sink section (2) that services itReverse this procedure t

Graphics boardNOTE: The graphics board spare part kit includes replacement thermal material.Description Spare part numberNVIDIA Quadro M2200 graphics

SpeakersDescription Spare part numberSpeakers (includes cable) 848233-001Before removing the speakers, follow these steps:1. Turn o the computer. If

TouchPad moduleDescription Spare part numberTouchPad moduleThe TouchPad module cable is available in the Cable Kit using spare part number 848244-001.

LED boardDescription Spare part numberLED board (includes cable) 848246-001Before removing the LED board, follow these steps:1. Turn o the computer.

HP BIOS Conguration Utility (BCU) ... 83HP Image Diagnostic Tool ...

FansDescription Spare part numberFan for use over the processor 848251-001Fan for use over the graphics card 848252-001Before removing the fan, follow

Fingerprint reader boardDescription Spare part numberFingerprint reader board (includes cable)The ngerprint reader bracket is available in the Bracke

5. The ngerprint reader board cable is attached to the top cover with double-sided adhesive. Use a tool to pry the ngerprint reader board up (4), an

4. Remove the bottom cover (see Bottom cover on page 36).5. Remove the battery (see Battery on page 37).6. Remove the hard drive (see Hard drive on pa

4. Remove the two Phillips PM2.5×7.0 screws (1) from the VGA bracket, and then remove the bracket (2).5. Remove the three Phillips PM2.5×7.0 screws (3

Display assemblyNOTE: Touch display assemblies are spared as a whole unit assemblies only. Non-touch display assemblies are spared at the subcomponent

9. Open the display all as far as possible (2).10. Separate the display from the computer (3).11. If it is necessary to replace the display assembly s

b. Remove the display bezel.The display bezel is available using the following spare part numbers:848241-001: Models without a camera850154-001: Model

CAUTION: Before turning the display panel upside down, make sure the work surface is clear of tools, screws, and any other foreign objects. Failure to

d. Remove the display panel from the display enclosure (3).NOTE: The display assembly will not be connected to the computer as shown in the following

Freeze at Windows Logo (hang/lockup) ... 108Electromagnetic Interference (EMI) ..

c. Remove the camera/microphone module (3) from the display enclosure.d. Remove the camera/microphone module.The camera/microphone module is available

a. Remove the cable from under the tape on the left side of the display enclosure (1).b. Remove the display/camera cable from the enclosure (2).The di

17. If it is necessary to replace the WWAN antennas, release the WWAN antenna cables from the routing channels built into the display enclosure (1), a

Lock bracketBefore removing the lock bracket, follow these steps:1. Turn o the computer. If you are unsure whether the computer is o or in Hibernati

6 Troubleshooting guideThis chapter is primarily focused on troubleshooting HP Mobile Workstations and HP Notebooks. The information is provided so th

ResourcesHP Resource Tool Description LinkHP Elite Support Provides live HP Premium support (available 24/7) to Elite computers.http://www8.hp.com/us/

Table 6-1 Troubleshooting methodology and general troubleshooting stepsIdentify issue Analyze issue Resolve issue Verify solution12. Test with verie

1. Power-on: Common issues are No Power, Recycle/Reboot, etc.2. POST: Common issues are No Boot (have power), Light Flash or Diagnostics Error.3. Perf

Failure classication by hardware devices and mechanicalTable 6-4 Failure classication by hardware devices and mechanical4. Display 5. I/O devices 6

3. Perform a visual inspection of hardwareIt is important to do a visual inspection of the hardware itself. Perform physical inspection of the compute

Mechanical ... 133

6. HP Hardware Diagnostics and ToolsHP oers dierent diagnostics and tools to diagnose hardware failure. This section describes how to use some of th

2. When the diagnostic tool opens, use the keyboard arrow keys to select the type of diagnostic test you want to run, and then follow the on-screen in

HP Support Assistant (HPSA)HP Support Assistant (HPSA) helps you maintain peak performance and resolve problems through automatic updates, built-in di

HP BIOS Conguration Utility (BCU)HP BCU is a free utility that captures the BIOS settings and their values. This tool provides a text le of the comp

7. Status lights, blinking light codes, troubleshooting lights, and POST error messagesCarefully observe any behavior the computer may be exhibiting:

Interpreting system validation diagnostic front panel LEDs and audible codesDuring the system validation phase that occurs at system startup, the BIOS

Component testedMajor/minor code Error conditionCaps Lock/Num Lock LED ActionBIOS 2.2 The main area (DXE) of BIOS has become corrupted and there is no

Table 6-5 System diagnostics failure codes and user actionsTest description Failure descriptionError code Suggested user actionsWireless Module not s

Table 6-5 System diagnostics failure codes and user actions (continued)Test description Failure descriptionError code Suggested user actionsChassis F

troubleshooting lights should not be lit. However, other external lights should be lit as normal afterward.Troubleshooting lights External lights Acti